arch/ia64/include/asm/asmmacro.h

   1 #ifndef _ASM_IA64_ASMMACRO_H
   2 #define _ASM_IA64_ASMMACRO_H
   3
   4 /*
   5  * Copyright (C) 2000-2001, 2003-2004 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9
  10 #define ENTRY(name)                             \
  11         .align 32;                              \
  12         .proc name;                             \
  13 name:
  14
  15 #define ENTRY_MIN_ALIGN(name)                   \
  16         .align 16;                              \
  17         .proc name;                             \
  18 name:
  19
  20 #define GLOBAL_ENTRY(name)                      \
  21         .global name;                           \
  22         ENTRY(name)
  23
  24 #define END(name)                               \
  25         .endp name
  26
  27 /*
  28  * Helper macros to make unwind directives more readable:
  29  */
  30
  31 /* prologue_gr: */
  32 #define ASM_UNW_PRLG_RP                 0x8
  33 #define ASM_UNW_PRLG_PFS                0x4
  34 #define ASM_UNW_PRLG_PSP                0x2
  35 #define ASM_UNW_PRLG_PR                 0x1
  36 #define ASM_UNW_PRLG_GRSAVE(ninputs)    (32+(ninputs))
  37
  38 /*
  39  * Helper macros for accessing user memory.
  40  *
  41  * When adding any new .section/.previous entries here, make sure to
  42  * also add it to the DISCARD section in arch/ia64/kernel/gate.lds.S or
  43  * unpleasant things will happen.
  44  */
  45
  46         .section "__ex_table", "a"              // declare section & section attributes
  47         .previous
  48
  49 # define EX(y,x...)                             \
  50         .xdata4 "__ex_table", 99f-., y-.;       \
  51   [99:] x
  52 # define EXCLR(y,x...)                          \
  53         .xdata4 "__ex_table", 99f-., y-.+4;     \
  54   [99:] x
  55
  56 /*
  57  * Tag MCA recoverable instruction ranges.
  58  */
  59
  60         .section "__mca_table", "a"             // declare section & section attributes
  61         .previous
  62
  63 # define MCA_RECOVER_RANGE(y)                   \
  64         .xdata4 "__mca_table", y-., 99f-.;      \
  65   [99:]
  66
  67 /*
  68  * Mark instructions that need a load of a virtual address patched to be
  69  * a load of a physical address.  We use this either in critical performance
  70  * path (ivt.S - TLB miss processing) or in places where it might not be
  71  * safe to use a "tpa" instruction (mca_asm.S - error recovery).
  72  */
  73         .section ".data..patch.vtop", "a"       // declare section & section attributes
  74         .previous
  75
  76 #define LOAD_PHYSICAL(pr, reg, obj)             \
  77 [1:](pr)movl reg = obj;                         \
  78         .xdata4 ".data..patch.vtop", 1b-.
  79
  80 /*
  81  * For now, we always put in the McKinley E9 workaround.  On CPUs that don't need it,
  82  * we'll patch out the work-around bundles with NOPs, so their impact is minimal.
  83  */
  84 #define DO_MCKINLEY_E9_WORKAROUND
  85
  86 #ifdef DO_MCKINLEY_E9_WORKAROUND
  87         .section ".data..patch.mckinley_e9", "a"
  88         .previous
  89 /* workaround for Itanium 2 Errata 9: */
  90 # define FSYS_RETURN                                    \
  91         .xdata4 ".data..patch.mckinley_e9", 1f-.;       \
  92 1:{ .mib;                                               \
  93         nop.m 0;                                        \
  94         mov r16=ar.pfs;                                 \
  95         br.call.sptk.many b7=2f;;                       \
  96   };                                                    \
  97 2:{ .mib;                                               \
  98         nop.m 0;                                        \
  99         mov ar.pfs=r16;                                 \
 100         br.ret.sptk.many b6;;                           \
 101   }
 102 #else
 103 # define FSYS_RETURN    br.ret.sptk.many b6
 104 #endif
 105
 106 /*
 107  * If physical stack register size is different from DEF_NUM_STACK_REG,
 108  * dynamically patch the kernel for correct size.
 109  */
 110         .section ".data..patch.phys_stack_reg", "a"
 111         .previous
 112 #define LOAD_PHYS_STACK_REG_SIZE(reg)                   \
 113 [1:]    adds reg=IA64_NUM_PHYS_STACK_REG*8+8,r0;        \
 114         .xdata4 ".data..patch.phys_stack_reg", 1b-.
 115
 116 /*
 117  * Up until early 2004, use of .align within a function caused bad unwind info.
 118  * TEXT_ALIGN(n) expands into ".align n" if a fixed GAS is available or into nothing
 119  * otherwise.
 120  */
 121 #ifdef HAVE_WORKING_TEXT_ALIGN
 122 # define TEXT_ALIGN(n)  .align n
 123 #else
 124 # define TEXT_ALIGN(n)
 125 #endif
 126
 127 #ifdef HAVE_SERIALIZE_DIRECTIVE
 128 # define dv_serialize_data              .serialize.data
 129 # define dv_serialize_instruction       .serialize.instruction
 130 #else
 131 # define dv_serialize_data
 132 # define dv_serialize_instruction
 133 #endif
 134
 135 #endif /* _ASM_IA64_ASMMACRO_H */